// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <algorithm>

#include "base/macros.h"
#include "ui/base/touch/selection_bound.h"
#include "ui/gfx/geometry/point_conversions.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/geometry/rect_f.h"

namespace ui {

SelectionBound::SelectionBound()
    : type_(EMPTY)
    , visible_(false)
{
}

SelectionBound::SelectionBound(const SelectionBound& other) = default;

SelectionBound::~SelectionBound()
{
}

void SelectionBound::SetEdgeTop(const gfx::PointF& value)
{
    edge_top_ = value;
    edge_top_rounded_ = gfx::ToRoundedPoint(value);
}

void SelectionBound::SetEdgeBottom(const gfx::PointF& value)
{
    edge_bottom_ = value;
    edge_bottom_rounded_ = gfx::ToRoundedPoint(value);
}

void SelectionBound::SetEdge(const gfx::PointF& top,
    const gfx::PointF& bottom)
{
    SetEdgeTop(top);
    SetEdgeBottom(bottom);
}

int SelectionBound::GetHeight() const
{
    return edge_bottom_rounded_.y() - edge_top_rounded_.y();
}

bool operator==(const SelectionBound& lhs, const SelectionBound& rhs)
{
    return lhs.type() == rhs.type() && lhs.visible() == rhs.visible() && lhs.edge_top() == rhs.edge_top() && lhs.edge_bottom() == rhs.edge_bottom();
}

bool operator!=(const SelectionBound& lhs, const SelectionBound& rhs)
{
    return !(lhs == rhs);
}

gfx::Rect RectBetweenSelectionBounds(const SelectionBound& b1,
    const SelectionBound& b2)
{
    gfx::Point top_left(b1.edge_top_rounded());
    top_left.SetToMin(b1.edge_bottom_rounded());
    top_left.SetToMin(b2.edge_top_rounded());
    top_left.SetToMin(b2.edge_bottom_rounded());

    gfx::Point bottom_right(b1.edge_top_rounded());
    bottom_right.SetToMax(b1.edge_bottom_rounded());
    bottom_right.SetToMax(b2.edge_top_rounded());
    bottom_right.SetToMax(b2.edge_bottom_rounded());

    gfx::Vector2d diff = bottom_right - top_left;
    return gfx::Rect(top_left, gfx::Size(diff.x(), diff.y()));
}

gfx::RectF RectFBetweenSelectionBounds(const SelectionBound& b1,
    const SelectionBound& b2)
{
    gfx::PointF top_left(b1.edge_top());
    top_left.SetToMin(b1.edge_bottom());
    top_left.SetToMin(b2.edge_top());
    top_left.SetToMin(b2.edge_bottom());

    gfx::PointF bottom_right(b1.edge_top());
    bottom_right.SetToMax(b1.edge_bottom());
    bottom_right.SetToMax(b2.edge_top());
    bottom_right.SetToMax(b2.edge_bottom());

    gfx::Vector2dF diff = bottom_right - top_left;
    return gfx::RectF(top_left, gfx::SizeF(diff.x(), diff.y()));
}

} // namespace ui
